Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Discharge lamp ignition and supply circuit having a PTC resistor

Discharge lamp ignition and supply circuit having a PTC resistor

US Patent 4647820 · Granted Mar 3, 1987

Estimated economic value: $619,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Discharge lamp fast preheat circuit independent of type of ballast1995
Discharge lamp ignitor which adjusts the amplitude of ignition pulses1992
Switching device and high-pressure discharge lamp1992
High-pressure sodium discharge lamp1988
Electronic device for the starting and a.c. voltage operation of a gas and/or va1983
Direct current to alternating current converter1982
Electric arrangement including at least one gas and/or vapor discharge tube1981
Metal vapor discharge lamp1980
Starter for igniting a gas and/or vapor discharge lamp1980